<template>
  <div>
    <!-- 面包屑导航区 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>数据统计</el-breadcrumb-item>
      <el-breadcrumb-item>数据报表</el-breadcrumb-item>
    </el-breadcrumb>

    <!-- 卡片视图区 -->
    <el-card>
      <!-- 1、为ECharts准备一个具备大小（宽高）的Dom -->
      <div id="main" style="width: 750px;height:400px;"></div>
    </el-card>
  </div>
</template>
<script>
  // 1、导入 echarts
  import * as echarts from 'echarts'
  import _ from 'lodash'
  export default {
    data() {
      return {
        // 需要合并的数据
        options: {
          title: {
            text: '用户来源'
          },
          tooltip: {
            trigger: 'axis',
            axisPointer: {
              type: 'cross',
              label: {
                backgroundColor: '#E9EEF3'
              }
            }
          },
          grid: {
            left: '3%',
            right: '4%',
            bottom: '3%',
            containLabel: true
          },
          xAxis: [
            {
              boundaryGap: false
            }
          ],
          yAxis: [
            {
              type: 'value'
            }
          ]
        }
      }
    },
    methods: {

    },
    created() {

    },
    // dom元素被初始化完毕了
    mounted() {
      // 3、基于准备好的dom，初始化echarts实例
      var myChart = echarts.init(document.getElementById('main'));

      this.$http.get(`reports/type/1`)
        .then((res) => {
          if (res.data.meta.status !== 200) {
            return this.$message.error('获取折线图数据失败！')
          } else {
            // 4、准备数据和配置项
            const result = _.merge(res.data.data,this.options)
            // 5、展示数据
            myChart.setOption(result)
          }
        })

    },
  }
</script>
<style lang="less" scoped>

</style>